The
preposition at is also frequently used in
placephrases.One use is for exact
addresses (addresseswith
a house or
building number). Another use is forgeneral locations--places (such as a school, officebuilding,
hotel) that are collections of more
specificlocations (particular rooms,
offices,
etc.)

Examples

Her favorite flower shop is at
1423 Main
Street.

He lives
at 2447 85th
Avenue, doesn't
he?

Our office is
located at
the southwest corner of23rd Street and Metropolitan Boulevard.

She's studying at
Oregon
State University.

The conference will be at
the Hyatt
Hotel.

Joey isn't here.
He's at
the mall playing video games.

___________________________________

Special Notes:

1.

Do not use atfor
addresses withouthouse or building
numbers:

wrong: *He
lives at Marshall Drive.

wrong:
*Alice's office is at Main Street.

2.

Do not use atfor
general locations
thathave boundaries
(cities, countries,regions,
states,
etc.):